/*
 * This file is part of BlueMap, licensed under the MIT License (MIT).
 *
 * Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
 * Copyright (c) contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package de.bluecolored.bluemap.core.resourcepack;

import com.google.common.base.Preconditions;

import de.bluecolored.bluemap.core.world.BlockState;

@FunctionalInterface
public interface PropertyCondition {

	static final PropertyCondition MATCH_ALL = new All();
	static final PropertyCondition MATCH_NONE = new None(); 
	
	boolean matches(BlockState state);
	
	public class Property implements PropertyCondition {
		
		private String key;
		private String value;
		
		private Property (String key, String value) {
			this.key = key.toLowerCase();
			this.value = value.toLowerCase();
		}
		
		@Override
		public boolean matches(BlockState state) {
			String value = state.getProperties().get(this.key);
			if (value == null) return false;
			return value.equals(this.value);
		}
		
	}

	class And implements PropertyCondition {
		
		private PropertyCondition[] conditions;
		
		private And (PropertyCondition... conditions) {
			Preconditions.checkArgument(conditions.length > 0, "Must be at least one condition!");
			
			this.conditions = conditions;
		}
		
		@Override
		public boolean matches(BlockState state) {
			for (PropertyCondition condition : conditions) {
				if (!condition.matches(state)) return false;
			}
			return true;
		}
		
	}
	
	class Or implements PropertyCondition {
		
		private PropertyCondition[] conditions;
		
		private Or (PropertyCondition... conditions) {
			Preconditions.checkArgument(conditions.length > 0, "Must be at least one condition!");
			
			this.conditions = conditions;
		}
		
		@Override
		public boolean matches(BlockState state) {
			for (PropertyCondition condition : conditions) {
				if (condition.matches(state)) return true;
			}
			return false;
		}
		
	}

	class All implements PropertyCondition {

		@Override
		public boolean matches(BlockState state) {
			return true;
		}
		
	}
	
	class None implements PropertyCondition {

		@Override
		public boolean matches(BlockState state) {
			return false;
		}
		
	}

	static PropertyCondition all() {
		return MATCH_ALL;
	}
	
	static PropertyCondition none() {
		return MATCH_NONE;
	}
	
	static PropertyCondition and(PropertyCondition... conditions) {
		Preconditions.checkArgument(conditions.length > 0, "Must be at least one condition!");
		
		return new And(conditions);
	}
	
	static PropertyCondition or(PropertyCondition... conditions) {
		Preconditions.checkArgument(conditions.length > 0, "Must be at least one condition!");
		
		return new Or(conditions);
	}
	
	static PropertyCondition property(String key, String value) {
		return new Property(key, value);
	}
	
	static PropertyCondition property(String key, String... possibleValues) {
		Preconditions.checkArgument(possibleValues.length > 0, "Must be at least one value!");
		
		if (possibleValues.length == 1) {
			return property(key, possibleValues[0]);
		}
		
		PropertyCondition[] conditions = new PropertyCondition[possibleValues.length];
		for (int i = 0; i < possibleValues.length; i++) {
			conditions[i] = property(key, possibleValues[i]);
		}
		
		return or(conditions);
	}
	
}
